Locomotive and stoker therefor



June 18, 1929.

N. M. LOWER ET AL 1.oc2Mo1TIx/ia: AND y sToKER vTmIREFoR Filed May 25,A 192s :s sheets-sheet June 18, 1929. N. M. LOWER` E1' AL LOCOMOTIVE AND STOKER` THEREFOR Filed May 25, 1926 3 Sheets-Sheet 2 AjZ June 18, l929.

N. M. LOWER ET AL.

LOCOMOTIVE AND STOKER THEREFOR 5 sheets-sheet 3 Filed May 25, 1926 Patented June 18, 1929.

UNITED STATES PATENT OFFICE.`

NATHAN M. LOWER AND EDWIN ARCHER TURNER, OF PITTSBURGH, PENNSYLVANIA, ASSIGNORS, BY MESNE ASSIGNMENTS, TO THE STANDARD STOKER COMPANY, INC., OF NEW YORK, N. Y., .A CORPORATION OF DELAWARE.

LOCOMOTIVE AND STOKER THEREFOR.

Application led'May 25,

The invention relates to locomotive stokers of the scatterfeed type, in which the fuel is introduced above the level of the tire bed and is scattered thereover, as by means of steam jets. More specifically it relates to the type of stokers in which the fuelis delivered into the fire-box through an aperture in the backiead immediately above the level ofthe grates, and is directed upwardly into the zone of a-ction of the steam jet.

Among the objects sought and attamedby the invention are simplicity of construction and durability.

Preferred embodiments of the invention are hereinafter described, and are illustrated in the accompanying drawings, in which Fig. 1 is a detail vertical central long1tud1- nal section o'f the rear portion of a fire-box, cab, and forward portion of the Stoker mechanism;

Figs. 2 and 3 are detail plan sections, respectively, on the lines 2 2 and 3-3 of Fi 1 lgfig.,4 is a view similar to Fig. 1, showing a modified form of construction;

Fig. 5 is a detail plan section on the line 5-5 of Fig. 4;

Fig. 6 is a view similar to F ig.l 1, showing a further modification;

Fig. 7 is a detail section on line 7-7 of Fig. 6; l

Fig. 8 is a viewsimilar to Fig. 6, showing al further modification; and

Fig. 9 is a detail section on the line 9-9 of Fig. 8.

The back-head of a fire-box is represented at 10, audits grate at 11. The cab Hoor or deck is shown at 12. An aperture 13 is formed in theback-head 10 immediately above the level f of the grates 11, and preferably under the hand tiring door openin 14'. A fuel deliver conduit 15, within w ich is housed a fuel adi'ancing screw 16, projects loosely into the aperture 13.

A hollow U-shaped approximately vertical wall 17 is located within the fire-box and inf closes the aperture 13 and the delivery end of the conduit 15, and encroaches but slightly on the grate area. The chamber of this wall is in communication with the chamber of the back-head, as shown at 18 18, to ermit the circulation of water through it. e wall extendsv downwardly below the surface of the gratas 11 a suicient distance to permit the ac- 1926. Serial No. 111,550.

a vertical web 24 which rests upon the inner face of the wall 17. The side of the bowl adjacent theback-head 10 is omitted or apertured to permit the delivery of fuel from the conduit 15. The curved wall of the bowl guides thc fuel upwardly to its top, where it comes under the influence of steam jets issuing from a nozzle 22 secured to the back-head 1U and supplied with steam through suitable pipes, as indicated at 23. Preferably the nozzle 22 is divided into a plurality of cham# bers, as indicated by dotted lines in Fig. 2, separate steam leads communicating with each of the chambers, thereby permitting the control of the jets for the purpose of trimming the fire.

The conduit 15 being supplied with fuel from the bin of the tender, and the screw 16 being driven by suitable means, as is common in devices of this character, the fuel is delivered into the bowl 2O and forced upwardly therethrough and is scattered bythe steam jets, the ange 21 serving as a guide table to facilitate its distribution. In the perfoi-mance of this latter function the flange 21 is in effect the top of the wall 17, and serves as a reinforcement thereof to take the wear incidcnt to the friction of the fuel.

The Wall 17 is as efectually protected from theheat as is the back-head 10, as water will circulate freely through it, and the bowl 20 is equally well protected. Should the iiange 21 be eaten away by the heat, the bowl will, nevertheless, be retained in its place by engagement of the flange 24 with the wall 17 and of the rear margin of the bowl with the backhezl, and the Stoker will function equally we In the construction shown in Figs. 4 and 5 a wall 25 `takes the place of the wall 17 in the construction already described, and differstherefrom in cer-tam details. From the juncture with the backhead 10 the ybottom of the wall 25 inclines upwardly as shown at ,26, to the central portion of its forward side, thereby preventing the accumulation of 'sediment within the wall, causing it all to descend into the mud ring of the backhead. The top margin of the wall 25 inclines downwardly, a's indicated at 27, from its juncture with the backhead, to thev center of its forward portion, thereby preventing the accumulation of steam which may occur where a steaming chamber, entirely filled with water, is provided with a flat cover plate.

As it is desirable to provide a substantially level surface over which the fuel may be driven by the steam jets, the bowl 20 is of the same form as shown in Fig. 1, except that the forward portion of its flange 21 is provided with one or more depending flanges 28 which rest upon the top of the wall 25. While this form of construction of the bowl dcprives its flange to some extent of the protection from heat derived from the circulation of water through the wall 25, it is protected by air currents entering through the open end of the chamber enclosed by the wall 25 and passing into the tirebox between the flange 21 and the top of the wall.

, Where this form of wall is used, special rate bars are provided to prevent the fuel from entering 'elow it. 'll`o this end there is shown a grate bar 29 at each side of the wall structure, the inner end of the bar being inclined upwardly as indicated at 30, the

upper end of the inclined portion meeting the side portion of the wall. The next pair rate bars 3l are also of special form, their inner ends being inclined upwardly and backwardly as indicated at 32 to meet the bottom of the forward portion of the wall 25. These special grate bars are controlled by a lever 33 independently of the leverl for actuating the remainder of the grate.

In the construction illustrated in Figs. 6 to 9 a hollow wall 34 corresponding in its princi al function to the walls 17 and 25, has its en s spaced from the back head l0, and

connected therewith by short nipples 35, 35-

at its top, and a air of similar nipples, as 36, only one of whic appears, adjacent its lower margin.y The bottom of the wall 3d is located at, or, if desired, somewhat above the up er surface of the grate, and is provided wit a blow-oi aperture as shown at 37, closed `by means of a plug 38, through which sediment ma be drained od and the chamber of the wa l dashed.

The'bowl 20 as in the forms already described may be resent and preventsthe fuel from escaping aterally from the chamber inclosed by the wall 34.' j

An inclined grate bar 39 is preferably located adjacent the outer surface of the wall 3d and prevents the heating of the lower portion of this wall to such an extent that should there be within it an accumulation of seeli-1 ment it will not be baked. This grate bar not only prevents the burning fuel from coma fuel through such aperture, an upstanding iol .low Ushaped wall inclosing the aperture, its

mienne l. In a locomotive lire-box, a hollow back-` head having an aperture adjacentthe grate, a fuel delivering conduit discharging through such aperture, a hollow upstanding,

U-shaped wall inclosing 'the aperture, its 5 chamber being in communication with the chamber of the back-head, the chamber enclosed by the wall being closed at its bottom,

and means above the wall for projecting fuel thereover upon the grate. j

2. ln a locomotive fire-box, a hollow back'- head having an aperture adjacent the grate, delivering conduit discharing chamber being in communication with the chamber of the back-head, a` bowl-shaped element fitting within the space inclosed by the wall and being open to the conduit, and means above the wall for projecting fuel thercover upon the'grate.

3. ln a locomotive tire-box, a hollow backhead having an aperture adjacent the grate, a fuel delivering conduit discharging through such aperture, an upstanding hollow Ushaped wall inclosing the aperture, 'its chamber being in communication with the chamber of the back-head, a bOWl-Shaped'element fitting within the space inclosed by the wall and being open tothe conduit andhaving an outstanding flange resting upon the top of the wall, and means above the wall for projecting fuel thereover upon the grate.

4. In a locomotive tire-box, a hollow backhead having an aperture adjacent the grate, a fuel delivering conduit discharging through such aperture, a hollow upstanding U-shaped wall inclosing the aperture, its chamber being in communication with the chamber of the back-head, the lower Aend of the wall extending below the ate surface7 the chamber enclosed by the wa l being closed at its bottom, and means above the wall for projecting fuel thereover upon the grate.

5. ln combination, a lire-box having a fuelreceiving aperture in theklower portion of its backhead, a water-cooled wall within the fire-box facing the aperture, .extending above the level of the fire bed on the grate and forming a guide for the entering fuel, and means for scattering the fuel over the wall.

6. ln combination, a {ire-box .having a hollow back-head, a hollow lli-shaped wall within the lire-box and having its ends adj aa cent to and in communication with the backhead thereof, a closure for the bottom of the chamber enclosed by the wall, means for delivering fuel into such chamber, and means for distributing fuel therefrom upon the grate of the fire-box.

7. In combination, a fire-box having a hollow back-head, a hollow U-shaped wall within the fire-box and having its ends adjacent to and in communication with the backhead thereof, the bottom of the wall being inclined upwardly from its ends, means for de' livering fuel into the chamber enclosed by the wall, and means for preventing the fuel from droppinfr from the chamber enclosed b the wall and means for discharging fuel t erefrom upon the grate of the fire-box.

8. In combination, a fire-.box having a hollow back-head, a hollow U-shaped wall within the fire-box and having its ends adjacent toand in communication with the backhead thereof, the bottom of the wallbeing above the grate, a normally inclined grate bar facing the space below the wall, means for delivering fuel into the chamber enclosed by the wall, and means for discharging fuel therefrom upon the grate of thefire-box.

9. In combination, a fire-box having a hollow backhead, a hollow U-shaped wall within the fire-box, extending above the bevel of the fire bed on the grate and having its ends adjacent to and in communication with the back-head thereof, the top of the wall being inclined downwardly from its ends, means for delivering fuel into the chamber enclosed by the wall such chamber bein closed-at its bottom, and means for distributing fuel therefrom upon the grate of the fire-box.

10. In combination, a' {ire-box havingr a. hollow back-head, a hollow U-shaped wall within the fire-box and having its ends adjacent to and in communication with thebackhead thereof, the top of the wall being inclined downwardly from its ends, a bowl Within the chamber enclosed within the wall and having an approximately horizontal flange overlying the top ofthe wall, means for delivering fuel into the chamber 'enclosed by the wall, and means for dischargigg fuel therefrom upon the grate of the firex.

11. In combination, a {irebox having a hollow back-head, a hollow U-shaped wall within the fire-box, its ends being adjacent tothe back-head thereof, tubes connecting the chamber of the wall with the chamber of the back-head, the chamber enclosed by the wall being closed at its bottom, means for delivering fuel into such chamber, and means for dischargin fuel therefrom ,over the grate of the ireox.

12. In combination, a fire-box having a. hollow back-head, a hollow U-sha ed wall within the fire-box, its ends being a jacent to the back-head thereof,tubes connecting the upper and lower portions of the chamber of the wall with the chamber of the back-head, means for delivering fuel into thechamber enclosed by the Wall such chamber being closed at its bottom, and means for discharging fuel therefrom over the grate of the ire-box.

13. In combination, a fire-box having a hollow back-head, a hollow upstanding U# shaped wall within the fire-box, the chamber of the wall being in communication with the chamber of the back-head of the fire-box and having a drain opening in its bottom, means for. delivering fuel into the chamber enclosed by the wall such chamber being closed at its bottom, and means for dischar ln fuel therefrom upon the grate of the reox.

14. In combination, a boiler, a fire-box having a backhead, a hollow U-shaped wall within the fire-box having its ends acent to the back-head, connection between the interiors of the -wall and of the boiler, the chamber enclosed by the wall being closed atvits bottom, means for delivering fuel into such chamber, and means for distributing fuel from such chamber over the grate of the fire-box.

15. In combination, a furnace having a grate and an upstanding wall, an upwardly inclined and upwardly openin fuel conduit entering the fire-box through t e wall, means for advancing fuel through the conduit, means for scattering fuel delivered by the conduit in aerial paths on the grate, and a water cooled shield for protecting the conduit within the firebox.

In testimony whereof we aix `our signatures. NATHAN M. LOWER.

E. ARCHER TURNER. 

